Remove an unused import from django.core.paginator

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16247 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/paginator.py

@@ -1,5 +1,4 @@
 from math import ceil
-import collections
 
 class InvalidPage(Exception):
     pass